SSSD error: Mismatch between input domain name [EXAMPLE] and parsed domain name [example.com]

Issue

• SSSD error message Mismatch between input domain name [EXAMPLE] and parsed domain name [example.com] is recorded:

  (2021-12-09 12:16:01): [ssh] [get_client_cred] (0x4000): Client [0x555c4da89840][23] creds: euid[0] egid[0] pid[10347] cmd_line['sss_ssh_authorizedkeys'].
  (2021-12-09 12:16:01): [ssh] [setup_client_idle_timer] (0x4000): Idle timer re-set for client [0x555c4da89840][23]
  (2021-12-09 12:16:01): [ssh] [accept_fd_handler] (0x0400): Client [CID #1][cmd sss_ssh_authorizedkeys][0x555c4da89840][23] connected!
  (2021-12-09 12:16:01): [ssh] [sss_cmd_get_version] (0x0200): Received client version [0].
  (2021-12-09 12:16:01): [ssh] [sss_cmd_get_version] (0x0200): Offered version [0].
  (2021-12-09 12:16:01): [ssh] [ssh_protocol_parse_request] (0x0400): Requested domain [EXAMPLE]
  (2021-12-09 12:16:01): [ssh] [ssh_cmd_get_user_pubkeys] (0x0400): Requesting SSH user public keys for [administrator@example.com] from [EXAMPLE]
  (2021-12-09 12:16:01): [ssh] [cache_req_set_plugin] (0x2000): CR #0: Setting "User by name" plugin
  (2021-12-09 12:16:01): [ssh] [cache_req_send] (0x0400): CR #0: REQ_TRACE: New request [CID #1] 'User by name'
  (2021-12-09 12:16:01): [ssh] [cache_req_process_input] (0x0400): CR #0: Parsing input name [administrator@example.com]
  (2021-12-09 12:16:01): [ssh] [sss_domain_get_state] (0x1000): Domain implicit_files is Active
  (2021-12-09 12:16:01): [ssh] [sss_domain_get_state] (0x1000): Domain example.com is Active
  (2021-12-09 12:16:01): [ssh] [sss_parse_name_for_domains] (0x0200): name 'administrator@example.com' matched expression for domain 'example.com', user is administrator
  (2021-12-09 12:16:01): [ssh] [cache_req_input_parsed] (0x0020): Mismatch between input domain name [EXAMPLE] and parsed domain name [example.com]
  (2021-12-09 12:16:01): [ssh] [ssh_protocol_done] (0x4000): Sending reply: error [1432158243]: Cannot parse input
  (2021-12-09 12:16:01): [ssh] [client_recv] (0x0200): Client disconnected!
  (2021-12-09 12:16:01): [ssh] [client_close_fn] (0x2000): Terminated client [0x555c4da89840][23]